We closed this in the call this week. However my write up was missing an important word - 'augmented' - see below. Any issues with this let me know, otherwise I will update the minutes and re-post on grid forge. 155 Errata: Timing of validation on unparsing (All) 8/11. Next step is to talk to XML Schema WG. 15/11: Steve was a call with Sandy Gao on Fri 25th. 22/11: Call on Nov 25th delayed until Dec 2nd 29/11: Call now delayed until Dec 9th. Steve has sent mail to Sandy 6/12: Call this Friday 13/12: Closed. Call held with Sandy Gao. XML does not have this problem to anywhere near the same extent, an XML document and its infoset should validate the same (a couple of minor exceptions are whitespace and namespace declarations). Decided that due to the inherent possibility of creating a DFDL schema that can unparse a stream that can not be reparsed, and for commonality with XML, that an errata should be taken on the spec to change the description of validation on unparse to be in terms of the augmented infoset. Noted that a user of an implementation always has the option to re-parse a stream to check that it will parse and validate. Regards Steve Hanson Architect, Data Format Description Language (DFDL) Co-Chair, OGF DFDL Working Group IBM SWG, Hursley, UK smh@uk.ibm.com tel:+44-1962-815848 Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU